Manufacture of split blanks



(No Model.)

W. GARRETT.

MANUPAGTURE 0F SPLIT BLANKS.

Patented Apr. 29, 1884.

g ,1. UNITED STATES PATENT OFFICE.

WILLIAM GARRETT, OF BEAVER FALLS, PENNSYLVANIA.

. l y l MANUFACTURE oF SPLIT BLANKS.

SPECIFICATION forming part of Letters Patent No. 297,593, dated April`29, 1884.

Application filed October 19. 1883. (No modela,

and useful Improvement in the Manufacture of Split Blanks; and I dohereby declare the fol-` lowing to be a full, clear, concise, and eXactdescription thereof, reference being had to lhammer by a cutter.

the accompanying drawings, making a part of this specification, inwhich-like letters indicating like parts- Figure I is a diagramillustrating by a series of end elevations of a bloom the severalchanges of form undergone by the4 same in its manufacture under myinvention, into a blank which is split or divided on one side; Fig. 2,

a diagram similarly illustrating the manufacture of a blank split ordivided upon two opposite sides; Fig. 3, a diagram showing theproduction of a rod or cylinderdivided as in Fig. 2; and Fig. 4, endsView of bloomswhich are split or divided longitudinally under a Myinvention is designed for, the manufacture of metal blanks, bars, orrods having a split or division extending inwardly from one side or fromtwo opposite sides, said blanks being suitable and desirable to beworked into'shovels, split keys, or cotters, Src.

To this end my improvements consist in a certain novel method ofrecessing and reducing a bloom to form a split blank, and ina blankhaving one or more lateral splits or divisions and formed from a bloomby the recessing and reduction in thickness thereof, as hereinafter morefully set forth.

In the practice of my invention I take a bloom, A, preferably ofrectangular section, and, after having properly heated the same, indentor impress therein-one or more lateral gaps or recesses, athe depth ofwhich corresponds with the depth of the split or division desired intheiinished blank. I then reduce the blank by any suitable means to thethickness required, and in the operation close together the sides of therecess or recesses after the sam'e have cooled below a welding-heat,such closed recess or recesses thus forming the desired lateraldivision'or divisions. y

The operation may be conveniently conducted by the ,employment of rollsin the recessing and reduction of the bloom. In such case, and referringfirst to the manufacture of a blank having but one lateral split ordivision, Ipass a bloom, as A, Fig. 1, between a pair of rolls, thelower of which is cylindrical ,and the upper provided with a collaradapted to form a lateral recess or gap, a, in the bloom, producing thesection A. The bloom is again passed through the rolls, to reducetherecess a to the depth desired for the split of I the finished blank, thesection on each side of the recess being left intact, and the bloombeing brought to the form shown at A2. The bloom is now turned over andpassed between a pair of plain-surfaced rolls, the action of which isexerted parallel with the recess a, by

which the entire section is reduced perpendicularly to said recess, asalso the width, but not the depth, o f the recess, as shown at A3. Thisoperation is continued by succes` sivepasses between the plain-surfacedrolls, asr

l in the ordinary method of rolling, the faces o the recess a beingclosed together in the course of the operation, as at. A5, and the bloombeing continuously reduced in thickness, as at A5, A, A7, and AS, untila blank, A, of the desired thickness and having a lateral split ordivision, a', between the closed up sides of therecess a, is produced.Such blank, which may be made of any proper width 4and thickness, is incondition to be cut into desired lengths for the manufacture of variousarticles. It is to be observed that the closing of the ref cess will notcause the welding together of its sides, as the bloom is at this stagelof the operation below a welding-heat.

Themanufacture of a blank which is solid at and adjacent to its centerand split or divided on two opposite sides is conducted in a similarmanner, as illustrated in Fig. 2. The heated bloom A is first passedbetween a pair of rolls! provided withk collars of such form and'location as to form'two recesses or gaps, a a, on opposite sides of thebloom, producing a section, as shown at A10. rIhe bloom is then passedonce or more through the rolls, whereby the depth of the recesses c c isfirst increased, as at A, and lin ally brought to the limit required, asat A12. fIhe bloom is then placed in an ordinary open square groove, or

IOO

by any other means known to the trade brought to the desired section, asshown at A, after which it is rolled ilat parallel with said recesses inthe ordinary method of rolling until reduced, as shown, to afinishedblank, A, of the :required thickness, and provided with a lateral splitor division, a, on each of two opposite sides. The bloom A (shown inFig. 8) is similarly recessed, and reduced, as at AW', A", A15, A", andA20, and the resultant blank thereafter rolled in the ordinary way intoa cylindrical bar or rod, A, having two opposite splits or divisions, a.

In lieu of forming the recess or recesses a by rolling, as beforedescribed, the same may be made by heating a bloom, placing it underahammer, and partially splitting or dividing itby means of a cutter,producing seetions, as indicated in Fig. 4, the recess or recesses a ofwhich are afterward closed together when the bloom is below aweldingheat under the ordinary process of rolling or hammering.

I claim herein as my invention- 1. rIhe improvement in the art ofmanufacturing laterally split or divided blanks which consists inindenting or impressing in a suitably rolled and heated bloom one ormore lateral gaps or recesses along the entire length thereof, andthereafter reducing the bloom to the required thickness, andsimultaneously closing up the recesses thereof without welding the same,substantially as set forth.

2. The improvement in the art of manufacturing laterally split ordivided metallic blanks which consists in first rolling one or morelateral gaps or recesses in a bloom,and thereafter closing up saidrecesses and reducing the bloom to the required thickness by rolling thesame parallel with the recesses thereof', substantially as set forth.

In testimony whereof I have hereunto set my hand.

VILLIAM GARRETT.

Witnesses:

J. SNowDnN BELL, It. H. XVIIrr'rLnsnY.

